@book{200355,
	author = {Edgren, Henry Daniel and Gruber, Joseph J.,},
	title = {Juegos para alumnos de primaria},
	publisher = {Editorial Pax México},
	year = {1990.},
	address = {México, D.F.},
	note = {Translation of : Teacher's handbook of indoor and outdoor games , c 1963.}
}